The thin sow problem.
D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004614:Emaciation / Q000662:veterinary; D005260:Female; D007411:Intestinal Diseases, Parasitic / Q000662:veterinary*; D009349:Nematode Infections / Q000662:veterinary*; D011247:Pregnancy; D013552:Swine; D013553:Swine Diseases